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Layer-by-layer assembly-induced triboelectric nanogenerators with high and stable electric outputs in humid environments

Authors
Kim, DojinLee, SeokminKo, YongminKwon, Cheong HoonCho, Jinhan
Issue Date
2월-2018
Publisher
ELSEVIER
Keywords
Triboelectric nanogenerator; Layer-by-Layer assembly; Nano-/micro-structure; Fluorination, Humidity
Citation
NANO ENERGY, v.44, pp.228 - 239
Indexed
SCIE
SCOPUS
Journal Title
NANO ENERGY
Volume
44
Start Page
228
End Page
239
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/77414
DOI
10.1016/j.nanoen.2017.12.001
ISSN
2211-2855
Abstract
We introduce a layer-by-layer (LbL) assembly-induced triboelectric nanogenerator (TENG) with a high and stable electric output under a wide range of humidity conditions. In this study, highly porous (cationic poly (allylamine hydrochloride) (PAH)/anionic poly(acrylic acid) (PAA))(n) multilayer films were prepared via a pH-controlled electrostatic LbL assembly with a subsequent acid treatment and were used as a mold for the triboelectric poly(dimethylsiloxane) (PDMS) replica. The electrical output of the TENGs composed of a protuberant PDMS plate and Al electrodes significantly increased based on the evolution of the nano-/micro-structured PDMS bumps. Particularly, the protuberant PDMS film molded from the porous (1.5 mg mL(-1) PAH/0.5 mg mL(-1) PAA)(20) multilayers displayed a high open-circuit voltage output of 242 V and a short-circuit current density of 16.2 mu A cm(-2) under a compressive force of 90 N in a relative humidity (RH) of 20%. When this hierarchical PDMS surface was additionally modified by fluorine self-assembled monolayer, the voltage output and current density of the resultant TENG at the same experimental conditions were increased up to approximately 288 V and 17 mu A cm(-2), respectively, exhibiting a remarkably high humidity-resistant electrical performance (16% loss of the initial voltage at 80% RH).
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공과대학 (화공생명공학과)
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